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Pure Lysine
Vita-Flex Nutrition — Item #11711
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Economical form of lysine

  • 9,099 mg of pure lysine
  • Lysine must be provided in your horse's diet because the body cannot make it on its own
Lysine is the protein component most often lacking in horses' diets. Pure Lysine provides a pure and economical form of this nutrient.

Learn More about Pure Lysine

View our Muscle Supplement Comparison Chart

Ingredients

Guaranteed Analysis:
(Maintenance Dose = 3 scoops (12 g) daily)
Ingredient Per Serving Per Pound
Lysine 9,099 mg 78.8%
Ingredient:: L-Lysine monohydrochloride.

Instructions

Instructions for Use:
Enclosed scoop holds 4 grams.
For foals and weanlings up to one year: feed 1 scoop (4 grams) per day.
For maintenance of mature horses: Feed 1 to 3 scoops (4-12 grams) daily.
For broodmares, horses in heavy training or competition: Feed 2 to 3 scoops (8-12 grams) daily.

Clinical Research

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    Reviews

    out of 5
    92% of customers would recommend this product to a friend!
    Tell us what you think!

    The reviews provided on this website represent the experience of the individual posting the review. We do not adopt, edit, or endorse any of the submissions posted within the reviews section. Rather, the reviews are part of an online community of animal owners that desire to share their particular experience with other individuals. These reviews are not a substitute for discussing the health of your animal with a veterinarian.

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    Pure Lysine is rated 4.6 out of 5 by 97.
    Rated 5 out of 5 by from Great value! My mare is on this to help with her immune system, and it does a great job.
    Date published: 2016-03-23
    Rated 5 out of 5 by from Quality product At the recommendation of another trainer, I started Lego on Lysine because he seemed to be so worn out by the last day of the show. The more tired and fatigued he became, the more nervous he became. He has now been to a few shows and his lethargy and nerves seem to be in check.
    Date published: 2016-02-01
    Rated 5 out of 5 by from Great product! I have been using this product for years and the results are wonderful.
    Date published: 2015-09-25
    Rated 5 out of 5 by from Has kept grass mumps away I have been using this for maybe 2 months. I got it on the recommendation of one of my vets to help.boost my mare's immune system. She has consistently gotten grass mumps the last few years on pasture, and they have been much improved since starting her on this. My vets are surprised, but I'm happy!
    Date published: 2015-07-04
    Rated 5 out of 5 by from A must have for my horses stomach issues Recommended by my vet after my horse was digniosed with herpies
    Date published: 2015-01-29
    Rated 3 out of 5 by from To soon to tell My older mare just started this a month ago. It was recommended because older horses don't process lysine as well as younger horses, and adding lysine was suggested to help rebuild her topline. She eats it but I will wait another month or so to see if the muscle improves.
    Date published: 2014-11-18
    Rated 5 out of 5 by from So far so good Bought to muscle up a young horse, and to build muscle on mid age horse, so far young one is growing, and older one is gaining muscle.
    Date published: 2014-10-15
    Rated 5 out of 5 by from Great Product for Muscle Building I purchased this for a young (4yo) QH gelding and a malnourished Clydesdale to help improve muscle mass and growth. It has been wonderful. I have seen improved toplines and muscling in both horses. They have been on it for two months and will continue to receive it. I do not grain them. They get pasture and a mineral supplement. I have no problem getting them to eat it.
    Date published: 2014-08-21
    Rated 5 out of 5 by from Easy to feed and I hope it is doing something I guess there is no concrete way to know that this is working for my mare. But I feed it in the hopes that it helps her feet grow stronger. She eats it so that is part of my good review of it, and I like that it is only lysine. So many supplements are full of other stuff to get the ingredients you want, so I appreciate it being only lysine.
    Date published: 2014-08-17
    Rated 5 out of 5 by from Seems to be working! We bought this for our 5 yr old aqha gelding because dispute being riden on a regular basis and being fed good quality feed wasn't muscling up like we wanted. So far he's been on this about a week and I see a little more definition in his muscle and his hind quarters look to be filling out! I also love that this product unlike most muscle supplements doesn't make your horse hot. Baised on the good results we are aeeing with our gelding I think we are going to be putting our two mares on it too! Also from reading pervious comments it sounds like it's safe for our hypp mare too which is a huge plus because she is a hard keeper. Love this product so far an would recommend!
    Date published: 2014-08-04
    Rated 5 out of 5 by from Pure Lysine is the most economical way Pure Lysine is the most economical way to put some muscle weight on a horse. It works relatively fast and doesn't change their attitude (doesn't make them hot or distracted or anything).
    Date published: 2014-03-18
    Rated 3 out of 5 by from Minimal improvement It's hard for me to really gauge this product because my 23 yr old Thoroughbred is naturally lanky and at his age kinda saggy. The improvement in my particular horse was only minimal but may be better with a different horse.
    Date published: 2014-02-23
    Rated 4 out of 5 by from a bit of overkill, but good Got this as a supplement to help my mare's mouth sores, it seemed to help a bit but not too sure as the weather turned to winter and I suspect weeds were the problem. The packaging was way overdone though, really not necessary, guess I just will get tubs or buckets of whatever I order in the future. I still haven't figured out what do do with those huge storage containers they sent me.
    Date published: 2013-12-23
    Rated 5 out of 5 by from
    Date published: 2013-12-17
    Rated 5 out of 5 by from Can't beat this product! I have 2 hard working barrel horses that needed a supplement to help them rebuild the muscle after strenuous work outs. A friend suggested Lysine and after reading all the reviews I decided to give it a try. I couldn't believe the difference in just 3 weeks. I feed 2-3 scoops a day, although the smell isn't great they ate it no problem. My leaner QH filled out more in his hip and doesn't look like a Thoroughbred any more. And my other horses bulk out tremendously. I definitely stand behind this product. Mine will stay on Pure Lysine! And you really can't beat the price!
    Date published: 2013-11-23
    Rated 5 out of 5 by from Great for topline!! I love this product bought it for my horse who needed more on his topline and now you cant even tell he didnt even need it love it!!
    Date published: 2013-11-08
    Rated 5 out of 5 by from Love this Product My father worked with race horses and Amino Acids were imperative to keeping these young athletes muscle mass in place. I have a 7 year old Quarter Horse mare that we could not keep a topline on, my father recommended finding a "Pure  Amino Acid" to put back in her system.  After 3 weeks her topline came right back and even with her workouts she is sustaining her weight, and looks like she is right off the track.  I have 11 other horses including two studs that I use this product on and they look unreal. I will continue to use this product in my feeding program. I already have our local Farm Supply looking into carrying it .
    Date published: 2013-10-18
    Rated 5 out of 5 by from Love this Product My father worked with race horses and Amino Acids were imperative to keeping these young athletes muscle mass in place. I have a 7 year old Quarter Horse mare that we could not keep a topline on, my father recommended finding a "Pure  Amino Acid" to put back in her system.  After 3 weeks her topline came right back and even with her workouts she is sustaining her weight, and looks like she is right off the track.  I have 11 other horses including two studs that I use this product on and they look unreal. I will continue to use this product in my feeding program. I already have our local Farm Supply looking into carrying it .
    Date published: 2013-10-18
    Rated 4 out of 5 by from Not on for too long I mainly bought this because I was trying to put weight and muscle on my 3 year old appaloosa who has such a hard time with muscle and weight. I only used this for a month so I cant accurately judge the product. Dusty, my horse, ate it right up every time so I had no problems there. Maybe if I were on it longer I would have seen results, but because I switched products I cant say.
    Date published: 2013-10-01
    Rated 4 out of 5 by from easy Lysine, was the rest of the treatment suggested after my young horse was diagnosed with herpes.He was very touchy and hated to be groomed and so far has been great.It has been a month and so far he has stayed very even.
    Date published: 2013-06-19
    Rated 5 out of 5 by from So far so good! Wanted to add muscle to my geldings topline but didnt have time to do daily strenghtening workouts- hes been off for 4 years so used this to boost him back into shape!So far so good & I even put myOther gelding on it now!!!
    Date published: 2013-05-08
    Rated 5 out of 5 by from Lysine helpful in horses with viral/herpes infections; also give small amount to cats with sniffles
    Date published: 2013-05-01
    Rated 3 out of 5 by from Winderful product but I've been a good customer for years, and I see several people on a regular basis to whom I have recommended Lysine 4-pound buckets which were $24.95 for a long time. We all meet on fridays often. But I will be recommending the exact same lysine in 4-pound buckets from either of two sources--shipped cheaply--I now pay $21.85. If your price comes down, I will recommend you again, otherwise, I will share my good news of 4-pound buckets for $21.85 with its inexpensive shipping. rohansel, Pennsburg, Pa
    Date published: 2013-02-19
    Rated 5 out of 5 by from Worked great for the top line I wanted to add topline on my 12 yr oldgelding. I did some research and decided totry it and the results were great! Very costEffective!!!
    Date published: 2013-01-12
    Rated 5 out of 5 by from Lysine great supplement for aging muscles I have a 30 year old Pinto gelding. When I bought him a couple of years ago, he had no muscle behind his shoulders and a pointed butt, no muscles there either. I read that the coastal bermuda in our area is very low in lysine which is needed to help maintain muscle mass in horses. So I started him on the lysine and a smartpak joint supplement. He is a beautiful 30 years young. I still ride him, and he loves to be first when going on trail rides. He still has the spunk of a 3 year old. Sometimes when I let him out to run in the arena on his own, he will actually buck and run! I love to see him this heathy and happy. We also had a Strangles breakout at the place were I board. Lysine helps with viruses, I think. Rio did not get the Strangles. He stayed perfectly healthy through the whole process. Thank you so much!
    Date published: 2012-11-10
    Rated 5 out of 5 by from
    Date published: 2012-10-11
    Rated 2 out of 5 by from Not impressed Was recomended to me by a trainer. Very dissapointed. See no benefits at all
    Date published: 2012-10-02
    Rated 1 out of 5 by from Didn't Work I used this product for 2 months and didn't see a difference, so I upped the dose for 3 more months and still didn't see a difference.
    Date published: 2012-06-20
    Rated 5 out of 5 by from I tried the pricier stuff...this works better! I have a halter bred gelding that just wasn't filling out like I wanted him to. I wasn't looking for that "halter stallion" look, but I wanted him to look like the stocky Quarter horse that he was. I have been using it for about 5 months and I can see a difference. ( I could see a difference after 2 months) He is more filled out on his top line, his hip, neck and shoulder! He looks natural and healthy! He is nicely muscled! I tried the more expensive stuff, but this just works BETTER! He places well in gelding halter classes locally!
    Date published: 2012-06-11
    Rated 4 out of 5 by from Seems to work My gelding does seem to be gaining lean muscle very well (but not the bulk I was hoping for-and that he is bred for) He eats it just fine. Its definitely a good value!
    Date published: 2012-04-20
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